节理裂隙对爆破效果影响研究

Study on Effect of Joint Cracks on Blasting Effect

节理裂隙对爆破效果有直接影响。基于数值模拟方法,分别对有与炮孔平行的1条裂隙和无裂隙的台阶爆破工况进行数值模拟。分析结果表明,第一主应力在台阶顶部位置有裂隙工况明显小于无裂隙工况,并且通过应力传播历程论证了有裂隙工况明显增加了应力反射和能量衰减的结论。

Joint cracks have directly influence on the blasting effect. Based on the numerical simulation method, the bench blast with one parallel joint fracture and without joint fracture is carried out. Analysis results show that the first principal stress at the top of the steps of the bench blast with one parallel joint fracture is significantly less than the condition without fracture, the stress of the joint fracture is reconstructed and the reflection of the stress is increased.